Hydrochloric Acid → 1-Aminoanthraquinone

Participants

Reaction Conditions

Reaction Steps

To a mixture of 600 parts of methyl alcohol, 200 parts of water and 70 parts of a 35% aqueous hydrochloric acid there was added with stirring 50 parts of 1-hydroxylaminoanthraquinone and the resulting mixture was heated to 70°C. After addition of 17 parts of metallic iron in the form of ribbon little by little over 1 hour, the reaction mixture was maintained at 70°C for additional 4 hours, then cooled to 25°C and filtered. The residue was washed with water, then dissolved in 500 parts of dimethylformamide and filtered to remove residual metallic iron. Dimethylformamide in the filtrate was removed by distillation under reduced pressure to obtain 42.0 parts of 1-aminoanthraquinone of a purity of 92%.

Provenance & Evidence